Yes it can be done. Higher RVR minima apply but no change to the DA/H. An example I just looked at (EGPD Rwy 16) gives Cat1 RVR 550m with 'full' lighting, 750m with 'limited' and 1200m with 'ALS out'. The only difference at night is, if RVR equipment fails, then you can factor reported met vis by (I think) 1.5 to get RVR equivalent.
Last edited by DB6; 21st December 2011 at 18:29.